Edge-plane fob trimming boot and shoe soles



UNITED STATES PATENT OFFICE.

ISAAC A. DUNHAM, OF NORTH BRIDGEVATER, MASSACHUSETTS.

EDGE-PLANE FOR TRIMMING BOOT AND SHOE SOLES.

Specification forming part of Letters Patent No. 18,237, dated September22, 1857; Reissued July 4,

To all whom t may concern:

Be it known that I, ISAAC A. DUNHAM, of North Bridgewater, in the countyof Plymouth and State of Massachusetts, have invented a new and usefulBoot and Shoe Makers Tool or Implement which I denominate a Sole or WeltTrimmer, and that the following description, taken in connection withthe accompanying drawings, hereinafter referred to, forms a full andexact specification of the same, wherein I have set forth the nature andprinciples of my said invention, by which it may be distinguished fromothers of a similar class, together with such parts as I claim anddesire to have secured to me by Letters Patent..

The figures of the accompanying plate of drawings represent my sole orwelt trim mer.

Figure l is a front or face view of the same. Fig. 2 is an edge view onan enlarged scale. Fig. 3 is a view of the rear side of the tool, alsoon an enlarged scale.

The operation of trimming or cutting olf the innerv edge of the sole ofa boot or shoe, or that portion nearest the vamp7 or uppen hasheretofore usually been done by the workmen with an ordinary knife. Todo this neatly and with rapidity has required considerable skill andgreat care on the part of the operator, else the vamp or upper would beout, and many boots and shoes have been spoiled in this manner.

By the use of my improved sole or welt trimmer, the necessary operationcan be performed with the utmost rapidity and nicety and without anypossibility of injuring the vamp or upper, a cutting blade and guardbeing used which together form a circle or very nearly, the cuttingblade being so arranged as to be readily set up to its guard, as fast asit becomes worn.

a a in the drawings represent a circular plate of which the cuttingblade a forms a part. This cutter turns upon a screwpivot b by which itis secured in any desired position to the stationary stock c c.

CZ CZ is a guard attached to or forming a part of the stock c c. On thisguard and close to the point of the cutting blade a is a smallprojection or nipple e, Figs. 2 and 3, which, as the tool is movedforward, brings the shaving of leather directly across the edge of thecutter and thereby cuts it free of the sole or welt; otherwise theshaving of leather would be out the requisite depth without beingentirely separated from the sole or welt, and would have to be pickedout. The cutting blade a is brought close to the guard which slightlyoverlaps it as shown, so that itis utterly impossible for the cutter tocome in contact with the vamp or upper, even if the tool be unskilfullyused by the operator. It will be seen that by hanging the cutter upon ascrew pivot the blade a as fast as it becomes worn can be set up to theguard d d.

By means of the tool thus constructed the sole or welt can be out ortrimmed much faster and more evenly than by an ordinary knife, whilethere is no danger of injuring the upper leather. i

Having thus described my improvement-s I shall state my claim asfollows:

-What I claim as my invention and desire to have secured to me byLetters Patent is- The new sole or welt trimmer constructedsubstantially as described, that is with a cutting blade and guard thattogether form a circle, or very nearly, and with the cutter so arrangedas to be set up to its guard as fast as it becomes worn by simplyturning the said cutter on its center as specified.

ISAAC A. DUNHAM.

Witnesses EZRA LINCOLN, JOSEPH GAVETT.

[FIRST PRINTED 1912.]

